diff --git a/lib/pkp b/lib/pkp
index d86f5d10a3b..2c28f6b10f8 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit d86f5d10a3bf0c9f860e18716467996e79a637f7
+Subproject commit 2c28f6b10f852b1420934219b1c1fe40b8de60b5